Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/***************************************************************************
2 * Linux PPP over L2TP (PPPoL2TP) Socket Implementation (RFC 2661)
3 *
4 * This file supplies definitions required by the PPP over L2TP driver
5 * (l2tp_ppp.c). All version information wrt this file is located in l2tp_ppp.c
6 *
7 * License:
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version
11 * 2 of the License, or (at your option) any later version.
12 *
13 */
14
15#ifndef _UAPI__LINUX_IF_PPPOL2TP_H
16#define _UAPI__LINUX_IF_PPPOL2TP_H
17
18#include <linux/types.h>
19#include <linux/in.h>
20#include <linux/in6.h>
21
22/* Structure used to connect() the socket to a particular tunnel UDP
23 * socket over IPv4.
24 */
25struct pppol2tp_addr {
26 __kernel_pid_t pid; /* pid that owns the fd.
27 * 0 => current */
28 int fd; /* FD of UDP socket to use */
29
30 struct sockaddr_in addr; /* IP address and port to send to */
31
32 __u16 s_tunnel, s_session; /* For matching incoming packets */
33 __u16 d_tunnel, d_session; /* For sending outgoing packets */
34};
35
36/* Structure used to connect() the socket to a particular tunnel UDP
37 * socket over IPv6.
38 */
39struct pppol2tpin6_addr {
40 __kernel_pid_t pid; /* pid that owns the fd.
41 * 0 => current */
42 int fd; /* FD of UDP socket to use */
43
44 __u16 s_tunnel, s_session; /* For matching incoming packets */
45 __u16 d_tunnel, d_session; /* For sending outgoing packets */
46
47 struct sockaddr_in6 addr; /* IP address and port to send to */
48};
49
50/* The L2TPv3 protocol changes tunnel and session ids from 16 to 32
51 * bits. So we need a different sockaddr structure.
52 */
53struct pppol2tpv3_addr {
54 __kernel_pid_t pid; /* pid that owns the fd.
55 * 0 => current */
56 int fd; /* FD of UDP or IP socket to use */
57
58 struct sockaddr_in addr; /* IP address and port to send to */
59
60 __u32 s_tunnel, s_session; /* For matching incoming packets */
61 __u32 d_tunnel, d_session; /* For sending outgoing packets */
62};
63
64struct pppol2tpv3in6_addr {
65 __kernel_pid_t pid; /* pid that owns the fd.
66 * 0 => current */
67 int fd; /* FD of UDP or IP socket to use */
68
69 __u32 s_tunnel, s_session; /* For matching incoming packets */
70 __u32 d_tunnel, d_session; /* For sending outgoing packets */
71
72 struct sockaddr_in6 addr; /* IP address and port to send to */
73};
74
75/* Socket options:
76 * DEBUG - bitmask of debug message categories
77 * SENDSEQ - 0 => don't send packets with sequence numbers
78 * 1 => send packets with sequence numbers
79 * RECVSEQ - 0 => receive packet sequence numbers are optional
80 * 1 => drop receive packets without sequence numbers
81 * LNSMODE - 0 => act as LAC.
82 * 1 => act as LNS.
83 * REORDERTO - reorder timeout (in millisecs). If 0, don't try to reorder.
84 */
85enum {
86 PPPOL2TP_SO_DEBUG = 1,
87 PPPOL2TP_SO_RECVSEQ = 2,
88 PPPOL2TP_SO_SENDSEQ = 3,
89 PPPOL2TP_SO_LNSMODE = 4,
90 PPPOL2TP_SO_REORDERTO = 5,
91};
92
93/* Debug message categories for the DEBUG socket option */
94enum {
95 PPPOL2TP_MSG_DEBUG = (1 << 0), /* verbose debug (if
96 * compiled in) */
97 PPPOL2TP_MSG_CONTROL = (1 << 1), /* userspace - kernel
98 * interface */
99 PPPOL2TP_MSG_SEQ = (1 << 2), /* sequence numbers */
100 PPPOL2TP_MSG_DATA = (1 << 3), /* data packets */
101};
102
103
104
105#endif /* _UAPI__LINUX_IF_PPPOL2TP_H */